Matching pin geometry with hole diameters.
The standard lists clear rules for parts and tools. This ensures that every connection stays strong for years. Plated-Through Holes
: Provides a completely lead-free process that bypasses hazardous flux chemistry.
Defective connectors can be pressed out and replaced with new ones up to a number of cycles specified by the standard, without damaging the PCB. iec 603525 pdf
: The rules now apply to many types of electronics, not just old phone systems.
| Edition | Year | Key Features / Changes | | :--- | :--- | :--- | | First edition | 1995 | Initial publication. | | Second edition | 2001 | Incorporated Amendment 1. | | Third edition | 2008 | Minor technical revision. | | | 2012 | Introduced major changes: removed all tables with hole dimensions; added tolerance ranges for test‑board holes; included a requirement for test‑board thickness. | | Fifth edition | 2020 | Current version. Expanded the scope to all electrical and electronic equipment; added definitions for ‘board’, ‘hole’ and ‘metal board’; removed the bending test; added press‑in and push‑out force graphs; reduced the number of test specimens required. |
By the end of this 2,000+ word guide, you will know exactly which standard you need, how to obtain a legitimate , and how to avoid counterfeit or outdated documents. Matching pin geometry with hole diameters
To ensure a reliable press-fit joint, both the terminal pin and the PCB hole must strictly comply with specific dimensions:
The standard is divided into two main parts:
The standard mandates strict dimensional tolerances for the PCB holes, as a deviation of even a few micrometers can ruin the connection. The raw hole size before plating. | Edition | Year | Key Features /
IEC 60352-5 Ed. 5.0 en:2020 - Solderless connections - Part 5
If you work with wire harnesses or cable assemblies, you may need . If you design backplanes or high‑speed connectors, IEC 60352‑5 is almost certainly the relevant standard. The 2024 edition of IEC 60352‑2 was published at the end of 2024, so the series as a whole remains very actively maintained.
: Used for electrical and electronic components across various industries, including telecommunications, automotive, and industrial controls.
A good connection must stay in place. The standard requires a . This means the pin must resist being pulled or pushed back out after assembly. Electrical Resistance
The standard defines how to test the push-in and pull-out forces to ensure a gas-tight connection without damaging the PCB through-holes. Environmental Stability: